The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Medication errors are three times higher among children and infants than with adults.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
(A) The name and shape of the adult teeth. These teeth represent those found in the right side of th